One Direction star Niall Horan has opened up about the "crazy" girls who attend the band's shows.

The X Factor contestants have become global icons over the past few months after they toured the US and Australia.

Speaking to Digital Spy, Horan admitted that some female fans have gone a little "crazy" at their shows. He said:

"You can see girls getting too excited and they start crying or worse. In a lot of these countries they don't get a lot of gigs to go to, so when they get to see their favourite artist they take full advantage of it. Obviously the excitement builds up too much for some on the night and they get a bit...crazy. Sometimes I've seen some stuff that's a bit too much! Also, sometimes they'll queue outside a venue for ages for us in the freezing cold. Queuing tips for fans: wrap up and bring food!"

Niall Horan also commented on talk of a possible collaboration with fellow boyband The Wanted after they said they might be up for teaming up for charity. He said:

"It would be just like Blazin' Squad! See you at the crossroads, crossroads, crossroads! That was a tune. It would be funny to see that, but we'll see what happens. I haven't heard anything about that yet."